Feed-pump for steam-boilers



Patented Feb. 28,1882.

ATTORNEYS.

PETERS. Fmwmw n mr. Wmhmglcn. v.1;

A MW 7 J. HOUPT. FEED PUMP-"FOR STEAM BOILERS.

WITNESSES e d 0 M 0 N PATENT OFFICE.

JO HN HOUPT, OF SPRINGTOVVN, PENNSYLVANIA.

FEED-PUMP FO-R STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 254,321, dated February28, 1882.

Application filed November 7, 1881.

To all whom it may concern Be it known that I, JOHN HoUPr, ofSpringtown, in the county of Bucks and State of Pennsylvania, haveinvented a new and useful Improvement in Hot-W'ater Feed-Pumps forSteam-Boilers; and I do hereby declare that the following is a full,clear, and exact description of the same.

The object of my invention is to provide an improved pump for supplyingsteam-boilers with hot water at a higher temperature and with greateruniformity of pressure than is practicable with feed-pumps of ordinaryconstruction, thus economizing fuel and tending to prevent theexplosions due to the water becoming low therein by the defectiveworking of the hot-water feed-pumps, which is most liable to occur whenthe water accidentally attains a very high temperature in the heaters,more especially the heaters of high-pressure engines.

The invention is embodied in the construction and combination of parts,which 1 will now proceed to describe, reference being made toaccompanying drawings, in which- 7 Figure 1 is a sectional elevation ofthe pump. Figs. 2,3,4 are plan views of certain parts that will behereinafter referred to.

The vertical pump-cylinder A is provided with a piston, B, reciprocatedby piston-rod 0, attached to a crank-shaft or cross-head. (Not shown.)Said piston B is annular in form, and a relief-valve, b, is seateddownward therein, the same being guided in its vertical movement bymeans of a pendent stem, as shown.

In the upper portion of cylinder A is located the outlet or dischargevalve E, which seats downward, and has a vertical guide-stem, d, aroundwhich is coiled a spiral spring, f. The function of the latter is topress down the valve E promptly at the moment when the piston B reachesthe limit of its upward stroke.

A cock, G, is provided, for use in drawing off the water from thecylinder when the pump is not in operation. The letter H indicates thehot-water-supply pipe, having a checkvalve, h, its location being thusintermediate of the feed-pump, (whose parts have been above described,)and the feed-water heater (not shown) or other source of supply. Betweensuch heater and valve h, I place an auxiliary (No model.)

force-pump, whose cylinder S is a continuation of the said tube H. Thepiston T is reciprocated simultaneously with the piston B, and in thesame direction. At the bottom of the cylinder S is a check-valve, u. Atube, P, having gage-cock 19, connects this auxiliary pump S T a withthe heater or source of supply, (not shown,) which is in practicelocated above the level of the pump-cylinder A, so that the pump willalways be primed and supplied by gravitation of the feed-water itself,independent of the pressure of the atmosphere.

Figs. 2, 3, 4 are plan views respectively of the guide ifordischarge-valve E, the seat k for said valve,and the lower part, 1, ofthe piston B. Since both pistons B T reciprocate together and in thesame direction, the piston B forces a charge of hot Water and steam,&c., past the outlet-valve E at one end of the cylinder A. The piston Tof the auxiliary feedpump S at the same time forces the next charge ofhot water past check-valve h in pipe H into the other end of thecylinder A, thus affording good and uniform charges or supplies of hotwater to the pump-cylinder A.

At the limit of its upward movement the pisward and fill suchvacuum-space more quickly than would be otherwise possible. The vacuumtherefore aids in raising water and steam above the piston B, andrelieves the pump of labor to that extent. The artificial pulsation thusproduced relieves any undue hack-pressure that may arise from theformation of steam in the pump-cylinder and supply-pipes, owing to thehigh temperature attained by the surrounding materials. It is hencepracticable to supply a steam-boiler with water of higher temperaturethan by means of the ordinary feed-pump, since there is greatly lessdanger of explosiou'from the rapid formation of steam in the cylinderand supply-pipes.

What I claim is 1. In a pump for feeding hot water to steamboilers, thecombination of the cylinder A, piston B, the latter having therelief-valve b, the spring check-valve h in the supply-pipe, and theoutlet-valve in the discharge end of said cylinder, all arranged tooperate as shown and described. v

2. In a pump forfeeding hot Water to steamboilers, the combination, withcylinderA, piston B b, and outlet and check valves, of the auxiliaryfeed-pump consisting of cylinder S,

valved piston T, and valve u, all as shown and 10 described, to operate,as hereinbefore specified, to produce an artificial pulsation,andrelieve undue pressure in the cylinder and supplypipes.

JOHN HOUPT. Witnesses:

GEORGE W. STUGKERT, VICTOR H. WIEAND.

